CN116404859A - Four-bridge arm matrix converter and modulation method under open-circuit fault of switching tube - Google Patents

Four-bridge arm matrix converter and modulation method under open-circuit fault of switching tube Download PDF

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Publication number
CN116404859A
CN116404859A CN202310385880.8A CN202310385880A CN116404859A CN 116404859 A CN116404859 A CN 116404859A CN 202310385880 A CN202310385880 A CN 202310385880A CN 116404859 A CN116404859 A CN 116404859A
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switch tube
bridge arm
matrix converter
switch
tube
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CN116404859B (en
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郭小强
杜森雨
张涵
刁乃哲
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Yanshan University
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Yanshan University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current

Abstract

The invention discloses a modulation method of a four-bridge arm matrix converter and a switching tube under open-circuit faults. By connecting a bidirectional thyristor at the midpoint of each bridge arm, the proposed four-bridge arm matrix converter can be changed into a three-bridge arm matrix converter when one or more switching tubes of any bridge arm have open-circuit faults, so that the normal operation of a three-phase load is ensured. The control method of the four-bridge arm matrix converter can enable the converter to control the bidirectional thyristors connected with the middle points of the corresponding fault bridge arms to act under the condition of single switching tube faults or in-phase multiple switching tube faults. The fault bridge arm is cut out of the converter to ensure that the three-phase load on the alternating current side works normally, and the reliability and fault tolerance of the converter are improved.

Description

Four-bridge arm matrix converter and modulation method under open-circuit fault of switching tube
Technical Field
The invention relates to the field of power electronics, in particular to a four-bridge arm matrix converter and a modulation method under open-circuit faults of a switching tube.
Background
The matrix converter has been widely used due to its excellent boosting capability, high power density, long life and other advantages. However, when a switch damage or an open circuit fault occurs, the output waveform of the four-leg matrix converter will be distorted. If left untreated, the converter may be damaged or even endangered for personal and property safety.
The Chinese patent application number is 202210527422.9, and the name is: a topology pulse width modulation method of a soft-switching high-frequency chain four-bridge arm matrix inverter is provided, and the topology of the soft-switching high-frequency chain four-bridge arm matrix inverter is provided, so that the switching loss of a switching tube in a high-frequency state can be reduced; and meanwhile, under the unbalanced working condition, three-phase balanced voltage is output. However, when an open-circuit fault occurs in the switching tube, the output waveform of the circuit will be distorted, and the normal operation of the converter is affected. Ding Danchuan et al 2022 in Chinese Motor engineering report, the nutraceutic name: open-circuit fault tolerance control research of a switched reluctance motor system based on a three-phase four-bridge arm converter provides that when open-circuit fault of a switching tube occurs, a fourth bridge arm is added to a circuit to replace a fault bridge arm to work. However, this solution is proposed based on a voltage source converter. The presence of a large capacitance on the dc side increases the volume of the converter and reduces the lifetime. Therefore, it is necessary to design a high power density, long life converter with open-circuit fault tolerance of the switching tube.
Disclosure of Invention
The invention aims to solve the technical problems of providing a four-bridge arm matrix converter and a modulation method under the open-circuit fault of a switching tube, which have high reliability and high power density, and have longer service life compared with a converter with a large capacitor at the direct current side, and when the open-circuit fault of the switching tube occurs, the bidirectional thyristor T is controlled 1 Two-way thyristor T 4 By bypassing the faulty phase, the converter can be made to operate normally in the event of a switch open fault.
In order to solve the technical problems, the invention adopts the following technical scheme: a four-bridge arm matrix converter comprises an input alternating square wave voltage source, a first pair of switching tubes S of a first bridge arm 21 Switch tube S 11 A second pair of switch tubes S of the first bridge arm 24 Switch tube S 14 First pair of switch tubes S of second bridge arm 23 Switch tube S 13 Second bridge arm second pair of switch tubes S 26 Switch tube S 16 First pair of switch tubes S of third bridge arm 25 Switch tube S 15 Second pair of switch tubes S of third bridge arm 22 Switch tube S 12 First pair of switch tubes S of fourth bridge arm 27 Switch tube S 17 Second pair of switch tubes S of fourth bridge arm 28 Switch tube S 18 Bidirectional thyristor T 1 Bidirectional thyristor T 2 Bidirectional thyristor T 3 Bidirectional thyristor T 4 A filter inductance L, a filter capacitance C and a power inductance L 1 ；
The first bridge arm is provided with a first pair of switch tubes S 21 Switch tube S 11 The sources are connected in series, the first bridge arm is provided with a second pair of switch tubes S 24 Switch tube S 14 The source electrodes are connected in series; switch tube S 11 The drains are respectively connected to the switch tubes S 24 Drain, bidirectional thyristor T 1 One end of the first electrode and one end of the filter inductor L;
the first pair of switch tubes S of the second bridge arm 23 S and S 13 The sources are connected in series, the second pair of switch tubes S of the second bridge arm 26 Switch tube S 16 The source electrodes are connected in series; switch tube S 13 The drains are respectively connected to the switch tubes S 26 Drain, bidirectional thyristor T 2 A first electrode and one end of a filter inductor L;
the first pair of switch tubes S of the third bridge arm 25 Switch tube S 15 The sources are connected in series, the third bridge arm is provided with a second pair of switch tubes S 22 Switch tube S 12 The source electrodes are connected in series; switch tube S 15 The drains are respectively connected to the switch tubes S 22 Drain, bidirectional thyristor T 3 A first electrode and one end of a filter inductor L;
the first pair of switch tubes S of the fourth bridge arm 27 Switch tube S 17 The sources are connected in series, the fourth bridge arm is provided with a second pair of switch tubes S 28 Switch tube S 18 The source electrodes are connected in series; switch tube S 17 The drains are respectively connected to the switch tubes S 28 Drain, bidirectional thyristor T 4 A first electrode and one end of a filter inductor L;
the first bridge arm switch tube S 14 Drain electrode, second bridge arm switch tube S 16 Drain electrode, third bridge arm switching tube S 12 Drain, fourth bridge arm switching tube S 18 The drains are connected in series; first bridge arm switch tube S 21 Drain electrode, second bridge arm switch tube S 23 Drain electrode, third bridge arm switching tube S 25 Drain, fourth bridge arm switching tube S 27 The drains are connected in series;
one end of the filter capacitor C is connected to the other end of the filter inductor L, and the other end of the filter capacitor C is connected to a load.
The technical scheme of the invention is further improved as follows: when the first bridge arm switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When one or several switches have open circuit fault, the bidirectional thyristor T 1 Conducting, simultaneously with bidirectional thyristor T 2 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 When the driving signal of (1) is high level, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the bidirectional thyristor T 1 Switch tube S 15 Switch tube S 25 Opening and closingClosing tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 1 Switch tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the bidirectional thyristor T 1 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 1 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 7: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 Is high, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 Conduction, four-bridge arm matrix converter is not usedEnergy is transferred to the load side, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 1 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 Is high, the triac T 1 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
The technical scheme of the invention is further improved as follows: when the second bridge arm is switched on and off 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When one or several switches have open circuit fault, the bidirectional thyristor T 2 Conduction, the bidirectional thyristor T 1 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 22 Switch tube S 12 When the driving signal of (1) is high level, the triac T 2 Switch tube S 11 Switch tube S 21 Switch tube S 22 Switch tube S 12 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 Is high levelWhen in use, the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the bidirectional thyristor T 2 Switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the bidirectional thyristor T 2 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 2 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 7: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 2 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 When the driving signal of (1) is high level, the triac T 2 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
The technical scheme of the invention is further improved as follows: when the third bridge arm is switched on and off 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 When one or several switches have open circuit fault, the bidirectional thyristor T 3 Conduction, the bidirectional thyristor T 1 、T 2 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 When the driving signal of (1) is high level, the triac T 3 Switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the two directions are oppositeThyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 When the power transmission device is conducted, the power transmission of the energy at the alternating current side and the direct current side is realized through the four-bridge arm matrix converter;
control operation mode 7: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the bidirectional thyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
The technical scheme of the invention is further improved as follows: when the fourth bridge arm switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When one or several switches have open circuit fault, the bidirectional thyristor T 1 、T 2 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the switching tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 When the driving signal of (2) is high level, the switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
When the working mode 2 is controlled: when the switching tube S 11 Switch tube S 21 Switch tube S 12 Switch tube S 22 Is high, the switching tube S 11 Switch tube S 21 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the switching tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the switching tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the switching tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
Control operation mode 6: when the switching tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 7: when the switching tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When the driving signal of (2) is high level, the switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the switching tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the switching tube S 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
The technical scheme of the invention is further improved as follows: the working state of the four-bridge arm matrix converter is generated by comparing a carrier wave with a modulated wave signal, and the calculation formula of the modulated wave is M 1 ＝msin(π/6-θ)T s 、M 2 ＝msin(π/6+θ)T s 、M 0 ＝1-M 1 -M 2 Wherein m is a modulation degree; t (T) s Is the sampling period; m is M 0 ～M 2 Modulated waves for each mode of operation; theta is three-phase reference signalPhase angle of the number; the carrier wave is a sawtooth wave with amplitude varying between 0 and 1, and the carrier frequency is a switching frequency.
The technical scheme of the invention is further improved as follows: when-30 DEG<When theta is less than or equal to 30 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 1, a control working mode 2 and a control working mode 7; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 1; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 2; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 7;
when 30 °<When theta is less than or equal to 90 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 2, a control working mode 3 and a control working mode 9; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 2; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 3; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 9;
when 90 DEG<When theta is less than or equal to 150 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 3, a control working mode 4 and a control working mode 8; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 3; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 4; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 8;
when 150 DEG<When theta is less than or equal to 210 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 4, a control working mode 5 and a control working mode 7; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 4; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 5; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 7;
when 210 DEG<When theta is less than or equal to 270 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 5, a control working mode 6 and a control working mode 9; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 5; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 6; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 9;
when 270 DEG<When theta is less than or equal to 330 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 6, a control working mode 1 and a control working mode 8, and when the carrier wave is more than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 6; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 1; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 And in the time, the four-bridge arm matrix converter operates in the control working mode 8.
By adopting the technical scheme, the invention has the following technical progress:
1. compared with the traditional four-bridge arm matrix converter topology, the four-bridge arm matrix converter topology provided by the invention has the advantage of high reliability; compared with the traditional two-stage topology, the four-bridge arm matrix converter topology provided by the invention has the advantage of high power density; compared with a converter with a large capacitor at the direct current side, the four-bridge arm matrix converter topology provided by the invention has the advantage of longer service life;
2. Compared with the traditional four-leg matrix converter topology, the four-leg matrix converter topology provided by the invention has the advantages that the midpoint of each leg is added with a bidirectional thyristor (T 1 、T 2 、T 3 、T 4 ). Due to the existence of the bidirectional thyristors, when one or more switching tubes of any bridge arm have open-circuit faults, the fault bridge arm is cut out of the system, and the normal operation of the three-phase load is ensured;
3. the control method of the high-reliability matrix converter can enable the converter to control the bidirectional thyristors connected with the middle points of the corresponding fault bridge arms to act under the condition of single switching tube faults or in-phase multiple switching tube faults. And cutting out the fault bridge arm from the converter, and enabling the converter to enter a working mode of the three-phase three-bridge arm matrix converter so as to ensure that the three-phase load on the alternating current side works normally, thereby being beneficial to improving the reliability and fault tolerance of the converter.
Drawings
FIG. 1 is a topology diagram of a four-leg matrix converter of the present invention;
FIG. 2 is a diagram illustrating the generation of switching tube control logic according to the present invention.
Detailed Description
The invention is further illustrated by the following examples:
as shown in FIG. 1, the four-bridge arm matrix converter with open-circuit fault tolerance function comprises an input alternating current square wave voltage source, a first pair of switching tubes S of a first bridge arm 21 Switch tube S 11 A second pair of switch tubes S of the first bridge arm 24 Switch tube S 14 First pair of switch tubes S of second bridge arm 23 Switch tube S 13 Second bridge arm second pair of switch tubes S 26 Switch tube S 16 First pair of switch tubes S of third bridge arm 25 Switch tube S 15 Second pair of switch tubes S of third bridge arm 22 Switch tube S 12 First pair of switch tubes S of fourth bridge arm 27 Switch tube S 17 Second pair of switch tubes S of fourth bridge arm 28 Switch tube S 18 Bidirectional thyristor T 1 Bidirectional thyristor T 2 Bidirectional thyristor T 3 Bidirectional thyristor T 4 A filter inductance L, a filter capacitance C and a power inductance L 1 。
The first bridge arm is provided with a first pair of switch tubes S 21 Opening and closingClosing tube S 11 The sources are connected in series, the first bridge arm is provided with a second pair of switch tubes S 24 Switch tube S 14 The source electrodes are connected in series; switch tube S 11 The drains are respectively connected to the switch tubes S 24 Drain, bidirectional thyristor T 1 The first electrode and one end of the filter inductor L.
The first pair of switch tubes S of the second bridge arm 23 S and S 13 The sources are connected in series, the second pair of switch tubes S of the second bridge arm 26 Switch tube S 16 The source electrodes are connected in series; switch tube S 13 The drains are respectively connected to the switch tubes S 26 Drain, bidirectional thyristor T 2 The first electrode and one end of the filter inductor L.
The first pair of switch tubes S of the third bridge arm 25 Switch tube S 15 The sources are connected in series, the third bridge arm is provided with a second pair of switch tubes S 22 Switch tube S 12 The source electrodes are connected in series; switch tube S 15 The drains are respectively connected to the switch tubes S 22 Drain, bidirectional thyristor T 3 The first electrode and one end of the filter inductor L.
The first pair of switch tubes S of the fourth bridge arm 27 Switch tube S 17 The sources are connected in series, the fourth bridge arm is provided with a second pair of switch tubes S 28 Switch tube S 18 The source electrodes are connected in series; switch tube S 17 The drains are respectively connected to the switch tubes S 28 Drain, bidirectional thyristor T 4 The first electrode and one end of the filter inductor L.
The first bridge arm switch tube S 14 Drain electrode, second bridge arm switch tube S 16 Drain electrode, third bridge arm switching tube S 12 Drain, fourth bridge arm switching tube S 18 The drains are connected in series; first bridge arm switch tube S 21 Drain electrode, second bridge arm switch tube S 23 Drain electrode, third bridge arm switching tube S 25 Drain, fourth bridge arm switching tube S 27 The drains are connected in series with each other.
One end of the filter capacitor C is connected to the other end of the filter inductor L, and the other end of the filter capacitor C is connected to a load.
Modulation method of four-bridge arm matrix converter under open-circuit fault of switching tube when switching tubeOpen circuit fault occurs and bidirectional thyristor T is controlled 1 Two-way thyristor T 4 By bypassing the faulty phase, the converter can be made to operate normally in the event of a switch open fault.
When the first bridge arm switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When one or several switches have open circuit fault, the bidirectional thyristor T 1 Conducting, simultaneously with bidirectional thyristor T 2 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 When the driving signal of (1) is high level, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the bidirectional thyristor T 1 Switch tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 1 Switch tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
Control operation mode 4: when the bidirectional thyristor T 1 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tubeS 28 When the driving signal of (1) is high level, the triac T 1 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 7: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 Is high, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 1 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 Is high, the triac T 1 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 Conduction, the four-bridge arm matrix converter no longer transmits energy to the load sideThe amount, the load is in a freewheel state;
control operation mode 9: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
When the second bridge arm is switched on and off 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When one or several switches have open circuit fault, the bidirectional thyristor T 2 Conduction, the bidirectional thyristor T 1 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 22 Switch tube S 12 When the driving signal of (1) is high level, the triac T 2 Switch tube S 11 Switch tube S 21 Switch tube S 22 Switch tube S 12 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 2 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the bidirectional thyristor T 2 Switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the bidirectional thyristor T 2 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 2 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 7: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 2 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 When the driving signal of (1) is high level, the triac T 2 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
When the third bridge arm is switched on and off 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 When one or several switches have open circuit fault, the bidirectional thyristor T 3 Conduction, the bidirectional thyristor T 1 、T 2 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 When the driving signal of (1) is high level, the triac T 3 Switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
Control operation mode 2: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 Conduction, energy on the AC-DC side passes through fourThe bridge arm matrix converter realizes power transmission;
control operation mode 3: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the bidirectional thyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 When the power transmission device is conducted, the power transmission of the energy at the alternating current side and the direct current side is realized through the four-bridge arm matrix converter;
control operation mode 7: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
Control operation mode 9: when the bidirectional thyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
When the fourth bridge arm switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When one or several switches have open circuit fault, the bidirectional thyristor T 1 、T 2 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the switching tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 When the driving signal of (2) is high level, the switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the switching tube S 11 Switch tube S 21 Switch tube S 12 Opening and closingClosing tube S 22 Is high, the switching tube S 11 Switch tube S 21 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the switching tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the switching tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the switching tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the switching tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 7: when the switching tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When the driving signal of (2) is high level, the switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the switching tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the switching tube S 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
As shown in FIG. 2, the working state of the four-bridge arm matrix converter is generated by comparing a carrier wave with a modulated wave signal, and the calculation formula of the modulated wave is M 1 ＝msin(π/6-θ)T s 、M 2 ＝msin(π/6+θ)T s 、M 0 ＝1-M 1 -M 2 Wherein m is a modulation degree; t (T) s Is the sampling period; m is M 0 ～M 2 Modulated waves for each mode of operation; θ is the phase angle of the three-phase reference signal; the carrier wave is a sawtooth wave with amplitude varying between 0 and 1, and the carrier frequency is a switching frequency.
Determining the working state of the four-bridge arm matrix converter by judging the angle of the phase angle of the three-phase reference signal and the size relation between the modulation wave and the carrier wave:
when-30 DEG<When theta is less than or equal to 30 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 1, a control working mode 2 and a control working mode 7; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 1; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 2; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 7;
when 30 °<When theta is less than or equal to 90 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 2, a control working mode 3 and a control working mode 9; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 2; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 3; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 9;
when 90 DEG<When theta is less than or equal to 150 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 3, a control working mode 4 and a control working mode 8; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 3; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 4; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 8;
when 150 DEG<When theta is less than or equal to 210 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 4, a control working mode 5 and a control working mode 7; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 4; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 5; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 7;
when 210 DEG<When theta is less than or equal to 270 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 5, a control working mode 6 and a control working mode 9; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 5; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 6; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 9;
when 270 DEG<When theta is less than or equal to 330 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 6, a control working mode 1 and a control working mode 8, and when the carrier wave is more than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 6; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 1; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 And in the time, the four-bridge arm matrix converter operates in the control working mode 8.

Claims (7)

1. A four-leg matrix converter, characterized by: comprises an input alternating current square wave voltage source, a first pair of switching tubes S of a first bridge arm 21 Switch tube S 11 A second pair of switch tubes S of the first bridge arm 24 Switch tube S 14 First pair of switch tubes S of second bridge arm 23 Switch tube S 13 Second bridge arm second pair of switch tubes S 26 Switch tube S 16 First pair of switch tubes S of third bridge arm 25 Switch tube S 15 Second pair of switch tubes S of third bridge arm 22 Switch tube S 12 First pair of switch tubes S of fourth bridge arm 27 Switch tube S 17 Second pair of switch tubes S of fourth bridge arm 28 Switch tube S 18 Bidirectional thyristor T 1 Bidirectional thyristor T 2 Bidirectional thyristor T 3 Bidirectional thyristor T 4 A filter inductance L, a filter capacitance C and a power inductance L 1 ；
The first bridge arm is provided with a first pair of switch tubes S 21 Switch tube S 11 The sources are connected in series, the first bridge arm is provided with a second pair of switch tubes S 24 Switch tube S 14 The source electrodes are connected in series; switch tube S 11 The drains are respectively connected to the switch tubes S 24 Drain, bidirectional thyristor T 1 First electrode and filterOne end of the wave inductor L;
the first pair of switch tubes S of the second bridge arm 23 S and S 13 The sources are connected in series, the second pair of switch tubes S of the second bridge arm 26 Switch tube S 16 The source electrodes are connected in series; switch tube S 13 The drains are respectively connected to the switch tubes S 26 Drain, bidirectional thyristor T 2 A first electrode and one end of a filter inductor L;
the first pair of switch tubes S of the third bridge arm 25 Switch tube S 15 The sources are connected in series, the third bridge arm is provided with a second pair of switch tubes S 22 Switch tube S 12 The source electrodes are connected in series; switch tube S 15 The drains are respectively connected to the switch tubes S 22 Drain, bidirectional thyristor T 3 A first electrode and one end of a filter inductor L;
the first pair of switch tubes S of the fourth bridge arm 27 Switch tube S 17 The sources are connected in series, the fourth bridge arm is provided with a second pair of switch tubes S 28 Switch tube S 18 The source electrodes are connected in series; switch tube S 17 The drains are respectively connected to the switch tubes S 28 Drain, bidirectional thyristor T 4 A first electrode and one end of a filter inductor L;
the first bridge arm switch tube S 14 Drain electrode, second bridge arm switch tube S 16 Drain electrode, third bridge arm switching tube S 12 Drain, fourth bridge arm switching tube S 18 The drains are connected in series; first bridge arm switch tube S 21 Drain electrode, second bridge arm switch tube S 23 Drain electrode, third bridge arm switching tube S 25 Drain, fourth bridge arm switching tube S 27 The drains are connected in series;
one end of the filter capacitor C is connected to the other end of the filter inductor L, and the other end of the filter capacitor C is connected to a load.
2. The modulation method of the four-leg matrix converter under the open-circuit fault of the switching tube according to claim 1, wherein the modulation method is characterized in that: when the first bridge arm switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 Wherein when one or more switches have open circuit fault, the double switchDirectional thyristor T 1 Conducting, simultaneously with bidirectional thyristor T 2 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 When the driving signal of (1) is high level, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
Control operation mode 3: when the bidirectional thyristor T 1 Switch tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 1 Switch tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the bidirectional thyristor T 1 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 1 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 7: when the bidirectional thyristor T 1 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 Is high, the triac T 1 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 1 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 Is high, the triac T 1 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the bidirectional thyristor T 1 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 Is high, the triac T 1 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
3. The modulation method of the four-leg matrix converter under the open-circuit fault of the switching tube according to claim 1, wherein the modulation method is characterized in that: when the second bridge arm is switched on and off 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When one or several switches have open circuit fault, the bidirectional thyristor T 2 Conduction, the bidirectional thyristor T 1 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 22 Switch tube S 12 When the driving signal of (1) is high level, the triac T 2 Switch tube S 11 Switch tube S 21 Switch tube S 22 Switch tube S 12 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 2 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the bidirectional thyristor T 2 Switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the bidirectional thyristor is turned onTube T 2 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 2 Switch tube S 15 Switch tube S 25 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
Control operation mode 7: when the bidirectional thyristor T 2 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 2 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 2 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 When the driving signal of (1) is high level, the triac T 2 Switch tube S 12 Switch tube S 22 Switch tube S 15 Switch tube S 25 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the bidirectional thyristor T 2 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 2 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
4. The modulation method of the four-leg matrix converter under the open-circuit fault of the switching tube according to claim 1, wherein the modulation method is characterized in that: when the third bridge arm is switched on and off 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 When one or several switches have open circuit fault, the bidirectional thyristor T 3 Conduction, the bidirectional thyristor T 1 、T 2 、T 4 The specific control method is as follows:
control operation mode 1: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 When the driving signal of (1) is high level, the triac T 3 Switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 11 Switch tube S 21 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
Control operation mode 4: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 18 Switch tube S 28 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 5: when the bidirectional thyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the bidirectional thyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 16 Switch tube S 26 When the power transmission device is conducted, the power transmission of the energy at the alternating current side and the direct current side is realized through the four-bridge arm matrix converter;
control operation mode 7: when the bidirectional thyristor T 3 Switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 When the driving signal of (1) is high level, the triac T 3 SwitchTube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the bidirectional thyristor T 3 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When the driving signal of (1) is high level, the triac T 3 Switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 9: when the bidirectional thyristor T 3 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When the driving signal of (1) is high level, the triac T 3 Switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
5. The modulation method of the four-leg matrix converter under the open-circuit fault of the switching tube according to claim 1, wherein the modulation method is characterized in that: when the fourth bridge arm switch tube S 17 Switch tube S 27 Switch tube S 18 Switch tube S 28 When one or several switches have open circuit fault, the bidirectional thyristor T 1 、T 2 、T 3 、T 4 The specific control method is as follows:
control operation mode 1: when the switching tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 When the driving signal of (2) is high level, the switch tube S 11 Switch tube S 21 Switch tube S 26 Switch tube S 16 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 2: when (when)The switch tube S 11 Switch tube S 21 Switch tube S 12 Switch tube S 22 Is high, the switching tube S 11 Switch tube S 21 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 3: when the switching tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 4: when the switching tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 12 Switch tube S 22 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
Control operation mode 5: when the switching tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 14 Switch tube S 24 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 6: when the switching tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 16 Switch tube S 26 Conducting, and realizing power transmission of energy at an alternating current side and a direct current side through a four-bridge arm matrix converter;
control operation mode 7: when the switching tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 Is driven by (a)When the signal is high, the switch tube S 11 Switch tube S 21 Switch tube S 14 Switch tube S 24 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
control operation mode 8: when the switching tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 When the driving signal of (2) is high level, the switch tube S 13 Switch tube S 23 Switch tube S 16 Switch tube S 26 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state;
Control operation mode 9: when the switching tube S 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 When the driving signal of (2) is high level, the switch tube S 15 Switch tube S 25 Switch tube S 12 Switch tube S 22 The four-bridge arm matrix converter is conducted, energy is not transmitted to the load side any more, and the load is in a follow current state.
6. The modulation method of any one of claims 2 to 5 for a four-leg matrix converter under a switching tube open-circuit fault, wherein: the working state of the four-bridge arm matrix converter is generated by comparing a carrier wave with a modulated wave signal, and the calculation formula of the modulated wave is M 1 ＝msin(π/6-θ)T s 、M 2 ＝msin(π/6+θ)T s 、M 0 ＝1-M 1 -M 2 Wherein m is a modulation degree; t (T) s Is the sampling period; m is M 0 ～M 2 Modulated waves for each mode of operation; θ is the phase angle of the three-phase reference signal; the carrier wave is a sawtooth wave with amplitude varying between 0 and 1, and the carrier frequency is a switching frequency.
7. The modulation method for the four-leg matrix converter under the open-circuit fault of the switching tube according to claim 6, wherein the modulation method is characterized by comprising the following steps: determining the working state of the four-bridge arm matrix converter by judging the angle of the phase angle of the three-phase reference signal and the size relation between the modulation wave and the carrier wave:
when-30 DEG<When theta is less than or equal to 30 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 1, a control working mode 2 and a control working mode 7; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 1; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 2; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 7;
when 30 °<When theta is less than or equal to 90 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 2, a control working mode 3 and a control working mode 9; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 2; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 3; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 9;
when 90 DEG<When theta is less than or equal to 150 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 3, a control working mode 4 and a control working mode 8; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 3; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in the operation control working mode 4; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 8;
when 150 DEG<When theta is less than or equal to 210 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 4, a control working mode 5 and a control working mode 7; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in the operation control working mode 4; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 5; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 7;
when 210 DEG<When theta is less than or equal to 270 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 5, a control working mode 6 and a control working mode 9; when the carrier is greater than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 5; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 6; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 When the four-bridge arm matrix converter is in a running control working mode 9;
when 270 DEG<When theta is less than or equal to 330 degrees, the four-bridge arm matrix converter alternately operates in a control working mode 6, a control working mode 1 and a control working mode 8, and when the carrier wave is more than 0 and less than M 1 When the four-bridge arm matrix converter is in a running control working mode 6; when the carrier is greater than M 1 And is less than M 1 +M 2 When the four-bridge arm matrix converter is in a running control working mode 1; when the carrier is greater than M 1 +M 2 And is less than M 1 +M 2 +M 0 And in the time, the four-bridge arm matrix converter operates in the control working mode 8.
CN202310385880.8A 2023-04-12 2023-04-12 Four-bridge arm matrix converter and modulation method under open-circuit fault of switching tube Active CN116404859B (en)

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